Increase both the number of requests per keepalive connection and
the number of keepalive connections to retain. This should reduce
the number of sockets used for a single connection and therefore
make it less likely that nginx will experience ephemeral socket
exhaustion at high request rates.

the new version moved UI-editing rights out of sysop and its own group because large wikis may have too big of a non-techy admin community (thousands). It would be pointless for a small wiki like ours.